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The SBC performs Packet Capture using 'tcpdump' and allows the captured file to be downloaded. The following section describes how to capture packets and download them.
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Packet Capture applies to both SBC 1000/2000 and SBC SWe Lite; differences in the configuration fields displayed are noted below. Functional differences include:
All screen captures reflect an SBC 1000/2000. |
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Performing a Media packet capture with no host filters or against hosts terminating multiple calls can impact traffic and cause current or future calls to fail or experience other problems. Performing a long duration capture which is outside of a maintenance window can adversely impact traffic, and should be avoided when possible. |
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You must use the SBC's ASM or insert an external USB into the
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is not |
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allowed due to available space limitations. |
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Sonus recommends that you use the SBC's ASM or insert an external USB into the
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is permitted |
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due to available space limitations on the internal flash. |
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Enabling Packet Capture
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The Packet Capture feature is intended for short duration packet captures. For that reason, a maximum duration of 120 minutes (2 hours) is permitted. |
The Enable Packet Capture option (available from the Packet Capture menu bar) enables the packet capture ability in the
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To enable packet capture:
- In the WebUI, click the Diagnostics tab.
In the left navigation bar, select Sonus TAC Troubleshooting > Packet Capture.
From the menu bar, click Enable Packet Capture.
Panel borderStyle none Caption 0 Figure 1 Enable Packet Capture At the Warning note, click OK.
Warning Enable Packet Capture only under the direction of Sonus TAC. Panel borderStyle none Caption 0 Figure 1 Enable Packet Capture - Warning Message
Packet Capture is enabled.
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Refer to Start Packet Capture.
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Starting Packet Capture
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Packet Capture must be enabled before capturing packets. |
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Refer to Enable Packet Capture. |
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To view Alarm/Event history logs for Packet Capture, access the Diagnostics tab and click Logs > Alarm/Event History. |
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To capture T.38 Fax, Sonus recommends enabling RTP Media and adding the Host 1 and Host 2 IP addresses of the next hop neighbor in Media SDP. |
The Start Capture option (available from the Packet Capture menu bar) enables the
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to capture packets.Spacevars 0 product2
To start capturing packets:
- In the WebUI, click the Diagnostics tab.
In the left navigation bar, select Sonus TAC Troubleshooting > Packet Capture.
From the menu bar, click Start Capture.
Panel borderStyle none Caption 0 Figure 1 Start Capture Panel borderStyle none Caption 0 Figure 1 Packet Capture Options - Select the network interface (including IP Version) from which the packets will be captured.
- Select an protocol(s) from which to capture the packets.
- Configure any relevant information for the Other Options sections. For details,
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- refer to Field Definitions.
Click OK.
The Packet Capture status turns to In Progress.Panel borderStyle none Caption 0 Figure 1 Packet Capture in Progress
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Interface
IP Version
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Protocol - Field Definitions
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Media (RTP/RTCP)
DSP/CSME
Active Directory
HTTP/HTTPS
All Other Protocols
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Other Options - Field Definitions
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TCP/UDP Ports
Host #1
Host #1 Direction
Host #2
Host #2 Direction
Maximum Packet Size
Overwrite
Duration
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Stopping Packet Capture
The Stop Packet capture feature is optional; this option is used to stop the packet capture early (before the packet capture reaches the time limit set in the Duration field).
To stop capturing packets:
- In the WebUI, click the Diagnostics tab.
In the left navigation bar, select Sonus TAC Troubleshooting > Packet Capture.
From the menu bar, click Stop Capture.
Panel borderStyle none Caption 0 Figure 1 Stop Capture Option
The Packet Capture stops.Panel borderStyle none Caption 0 Figure 1 Packet Capture Stops
Downloading Capture Files
Once the packet capture has stopped, the captured file will appear in the table List of Captured Files.
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If you need to stop the packet capture early, from the menu bar, click Stop Capture. |
To download captured files:
From the List of Capture Files table, next to the desired file, click Download.
Panel borderStyle none Caption 0 Figure 1 Capture Files Select the appropriate location to save the file. Click OK.
Panel borderStyle none Caption 0 Figure 1 Save File
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Only one packet capture can be downloaded at a time. Depending on the size of the file and network connection, a download can take several minutes. |
Moving Internal or ASM Capture Files
If the file location for the packet capture is Internal or an ASM, and the system has an external USB present and available, an additional option, Move, will appear under the Action column. The Move action relocates the packet file to the external USB, which can then be removed and taken to a PC.
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The packet capture can only be saved on the internal flash for SBC 2000. |
To move captured files:
From the List of Capture Files table, next to the desired file, click Move.
Panel borderStyle none Caption 0 Figure 1 List of Capture Files
Packet Capture Limitations
The following lists the limitations of Packet Capture.
Size Limitations
- An individual Packet Capture file is limited to 350
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- MiB in size. After the 350
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- MiB limit has been reached, a new file will be created to continue the packet capture.
- A Packet Capture session size limit is dependent on whether or not
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- 30 GiB is less than the available storage space minus ( - ) 30%
Or - Available storage space minus ( - ) 30% is less than
- 30 GiB is less than the available storage space minus ( - ) 30%
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- 30 GiB
- 30 GiB
- For SBC 1000, if there is no external USB or ASM module with a mounted hard drive, the Packet Capture will not be allowed to occur because of storage limitations.
Protocol Filters Restrictions
If Protocol Filters Active Directory, HTTP/HTTPS, or All Other Protocols are set to True, the following options will be hidden and no longer configurable:
- Media
DSP/CSME
- TCP/UDP Ports
TCP/UPD Ports Restrictions
If any TCP/UDP Ports are entered, the following options will be hidden and no longer configurable:
- Active Directory
- HTTP/HTTPS
- All Other Protocols
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